Abstract: A method of protecting a rotating device, loaded by temperature of a machine tool with one temperature sensor on that device and a temperature bloc, comprising the steps of inputting specific parameters in the temperature bloc, estimating a value for the device temperature increase caused by the activity of the device and measuring the temperature of the device.

Abstract: A wire cutting device for an electrical discharge machining (EDM) machine with a wire draw-off device, which moves a wire electrode along a feed direction into a cutting zone of the EDM machine; and with a deflection unit in order to deflect the wire electrode running in the feed direction into the cutting zone from the feed direction into a cutting area, in which at least one cutting edge acts on the wire electrode in the cutting area in order to cut it.

Abstract: A machine tool (1, 1?), in particular a drilling and milling machine, comprising a housing (20) having a machine bed (2), together with side walls (3, 4) and doors (5, 6, 7), comprising a fixed, pivotable or rotatable work table (8, 9), and comprising a slide (10), transportable in the y direction, for the reception of a spindle head (11), transportable in the x-z direction, for the reception of tools (12), wherein the front door (5), for the enlargement of the working and loading area (21) in the upward direction, is of transomless configuration, the roof region (13) of the machine (1, 1?) has an automatically operable cover (16), the rear region (22) of the machine (1, 1?) has an integrable automatic pallet changer (14), and the machine (1, 1?) is assigned an automatic tool changer (15).

Abstract: The invention provides a method of operating a machine tool, e.g., an electrical discharge machine (4), and a machine tool system comprising a machine (4) for machining a workpiece wherein at least one of controlling, monitoring and carrying out of the machining of the workpiece is performed by a plurality of configurable modules (DRIVE; GEN; CONTROL), said modules (DRIVE; GEN; CONTROL) are arranged on the machine (4), and said modules (DRIVE; GEN; CONTROL) are so linked by a data network (6) to a node (5) for at least one of sending data to said node (5) and receiving data from said node (5).

Abstract: An apparatus and a method of generating machining pulses for electrical discharge machining by discharge of at least one line applying a voltage to a working gap formed between a machining electrode and a workpiece, including the steps of: charging the line via a first charging circuit by a voltage source, discharging the line after ignition of the spark gap directly via a diode, without impedance matching, at the working gap, and recharging the line after a predefined pulse-off time.

Abstract: A wire cutting device for an electrical discharge machining (EDM) machine with a wire draw-off device, which moves a wire electrode along a feed direction into a cutting zone of the EDM machine; and with a deflection unit in order to deflect the wire electrode running in the feed direction into the cutting zone from the feed direction into a cutting area, in which at least one cutting edge acts on the wire electrode in the cutting area in order to cut it.

Abstract: A method and apparatus for electrical discharge machining of a workpiece wherein an erosion pulse is applied on the tool electrode. During the time of the erosion pulse the voltage (Ue) set on the electrode is acquired, and the erosion pulse is interrupted, after an asymptotic behavior of the acquired voltage (Ue) or a value derived therefrom has been acquired. Before the interruption of the erosion pulse an increase of current may occur.

Abstract: A method and device for disturbance sensing in the drive system of a numerically controlled machine tool or similar device is disclosed, in which at least one drive motor for positioning of a machine part being moved such as an advance slide or an X/Y cross-slide is coupled via one or more transmission elements in which the position of the moving machine part is measured directly on the machine part and also indirectly in at least one location in the transmission chain. Direct and indirect position measured values are compared and the measured value comparison value is used to record a disturbance with consideration of the actual operating conditions, such as machining speed and acceleration/delay, optionally moved masses and machine-specific process forces upon fulfillment of a specific criterion.

Abstract: A method and a device are for controlling multiple machining processes in a die-sink erosion machine with several identical or different electrodes (R1, R2, R3, R4), whereby the machining sequence of the machining processes and the electrode used for each machining process are determined by providing the following criteria: a) predefining priorities of workpieces to be machined, of a group of machining procedures, of individual machining jobs (ARB), of work cycles (AZ) and/or work steps (AS) of a machining job; and/or (b) predefining the life span or wear limit of the electrodes used for the individual machining jobs, work cycles or work steps. The overall machining on the die-sink erosion machine is performed with consideration of the determined machining sequence.

Abstract: Devices and methods are disclosed for the contactless detection of a bar-shaped or wire-shaped processing electrode of a machine tool such as a spark erosion machine. The detection is based on measuring an impedance change in the measuring area, which is caused by the processing electrode moving through the measuring area. The impedance change is measured by one or more measuring electrodes disposed in the measuring area.

Abstract: A machine tool with a machine frame is disclosed. A first tool guide is provided on the frame to guide a tool to a first guide position. The first tool guide is a movable gantry carrier with a movable first sliding carriage. The tool guide can be moved with respect to the machine frame in a first plane along a first direction and in a second direction which is orthogonal with respect to the first direction. Furthermore, a second tool guide is provided on the machine frame to guide the tool to a second guide position. The second tool guide can be moved with respect to the machine frame in a second plane along a third direction and a fourth direction which is orthogonal to the third direction, independently of the first tool guide. Finally, a tool holder is provided on the machine frame to hold the machined part. The machined part is led between the first and the second guide positions of the tool. The second tool guide is a movable gantry carrier with a movable second sliding carriage.

Abstract: Devices and methods for threading a wire electrode in a wire erosion machine are disclosed. A feed-through channel is provided for producing a fluid jet within which the machining electrode is guided. One or more control devices are provided for varying the cross section of the feed-through channel and, thus, the cross section of the fluid jet.

Abstract: Methods and apparatus are disclosed for the processing of a work piece by electrical discharge, the processing being carried out with at least two wire electrodes. In the process, the offset of both the positions of the at least two wire electrodes relative to one another are determined, which positions the wire electrodes occupy upon their clamping, because of their angles of contact on a corresponding wire guide and their different wire characteristics at the level of the work piece. Further, the positions for the wire electrodes during the processing of the work piece after a change from one wire electrode to the next one are connected on the basis of the offset determined between these wire electrodes.

Abstract: A method and apparatus for electrical discharge or electrochemical machining of workpieces, in which a machining electrode is moved relative to a workpiece, the machining is performed in cycles, and the appropriate process parameters are adjusted for machining of the current cycle with consideration of process parameters of the current cycle. To improve this method and the apparatus to the extent that improved geometric machining accuracy is made possible without time losses, stored process parameters of at least one previous cycle are also considered for adjustment of the process parameters of the current cycle.

Abstract: A method and a device for controlling a number of machining processes on a machine tool with the help of a control device (20) that controls at least one tool for performing said number of machining processes under the direction of a control program, whereby the control program is created using a description of the tools required for performing the machining processes, and whereby the data for describing the tool are hereby divided in memories (24, 25) of the control device (20) into: (a) abstract tool data for describing a standard tool (V1, V2), and (b) specific tool data for correcting and/or adapting the abstract tool data to the actually used tool (R1, R2) or to machine-specific characteristics, whereby the tool description in the control program is obtained by linking the abstract tool data with the specific tool data.

Abstract: A wire tensioning system for a wire-shaped working electrode of a spark erosion machine and a procedure for the tensioning of the working electrode. The working electrode at least nearly circumferentially encompasses a braking roller in a wire entry zone and/or a tensioning roller in a wire withdrawal zone. A nozzle is assigned to the braking and/or the tensioning roller such that the nozzle exerts a tensile force on the working electrode to tension the wire.

Abstract: A method and a device are for controlling multiple machining processes in a die-sink erosion machine with several identical or different electrodes (R1, R2, R3, R4), whereby the machining sequence of the machining processes and the electrode used for each machining process are determined by providing the following criteria: a) predefining priorities of workpieces to be machined, of a group of machining procedures, of individual machining jobs (ARB), of work cycles (AZ) and/or work steps (AS) of a machining job; and/or (b) predefining the life span or wear limit of the electrodes used for the individual machining jobs, work cycles or work steps. The overall machining on the die-sink erosion machine is performed with consideration of the determined machining sequence.

Abstract: A device for preparation of a machining electrode, especially a machining electrode or bar sinking electrode in an EDM machine for feed into an electrode guide system. The device employs a suction and advance device for suction and advance of the machining electrode and at least one pressure equalization device. Additionally, an electrode change device is disclosed having at least two devices for preparing the machining electrode and a method for preparation of a machining electrode.

Abstract: An EDM machine for machining a workpiece is disclosed. The EDM machine includes a machine frame having a central stationary machine body and a machining electrode to machine the workpiece. Machining occurs by producing a relative movement in at least one of an X axial direction and a Y axial direction between the machining electrode and the workpiece. The machine also includes a first axial slide for moving at least one of the workpiece and the machining electrode in the X axial direction, and a second axial slide for moving at least one of the machining electrode and the workpiece in the Y axial direction. The first axial slide is mounted in a substantially vertical plane on the machine body for lateral movement in a substantially horizontal direction.